Classification of Perrilliat et al. 2006

G. Trochus Linnaeus 1758
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Trochus maculatus Linnaeus 1758
G. †Pachycrommium Woodring 1928
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†Pachycrommium clarki Stewart 1927
G. Architectonica Röding 1798 [sundial]
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G. †Hercoglossa Conrad 1866
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†Hercoglossa ulrichi White 1882
Fm. Turritellidae Lovén 1847 [turret shell]
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G. Haustator Monfort 1810
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Haustator gallicus Montfort 1810
†Haustator rivurbana Cooke 1926
G. Mesalia Gray 1847
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†Mesalia alabamiensis De Gregorio 1890
G. †Palmerella Allmon 1996
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†Palmerella mortoni Conrad 1830
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†Palmerella mortoni mexicana Perrilliat et al. 2006
Subfm. †Ampullospirinae Cox 1930
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G. †Crommium Cossmann 1888
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†Crommium globosa Perrilliat et al. 2006
Fm. Cassidae Latreille 1825
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G. Galeodea Link 1807
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†Galeodea koureos Gardner 1939
Fm. Melongenidae Gill 1867
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G. †Cornulina Conrad 1853
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†Cornulina armigera Conrad 1833
G. †Levifusus Conrad 1865
Fm. Potamididae Adams and Adams 1854 [horn snail]
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Subfm. Potamidinae Adams and Adams 1854 [horn snail]
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G. †Potamides Brongniart 1810
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Subg. †Potamides (Potamidopsis) Munier-Chalmas 1900
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Invalid names: Cerithium mutabile Lamarck 1804 [synonym], Potamides (Tympanotomus) semicoronatum Lamarck 1804 [synonym]
†Potamides lamarckii Brongniart 1810
Fm. Trochidae Rafinesque 1815 [top snail]
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G. Calliostoma Swainson 1840
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†Calliostoma granulata Perrilliat et al. 2006
Fm. Volutidae Rafinesque 1815 [volute]
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Subfm. Fulgorariinae Pilsbry and Olsson 1954
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G. †Athleta Conrad 1853
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†Athleta petrosa Conrad 1833
G. †Lapparia Conrad 1855
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†Lapparia nuda Stenzel and Turner 1940
G. †Lyrischapa Aldrich 1911
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†Lyrischapa harrisi Aldrich 1911
†Lyrischapa spinifera Perrilliat et al. 2006
G. †Volutilithes Swainson 1829
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†Volutilithes muricinus Lamarck 1802
G. Volutocorbis Dall 1890
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†Volutocorbis minutus Perrilliat et al. 2006
Fm. Pseudolividae de Gregorio 1880
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G. †Sulcobuccinum d'Orbigny 1850
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†Sulcobuccinum scalina Heilprin 1880
Subfm. †Cerithiinae Fleming 1822
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G. Bittium Gray 1847
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Subg. Bittium (Bittium) Gray 1847
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G. †Iddingsia Olsson 1929
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Fm. Cerithiidae Fleming 1822 [cerith snail]
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G. Cerithium Bruguière 1789
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Cerithium adansonii Bruguiére 1789